We demonstrate an novel pathway for high-efficient fluorescence-based organic light-emitting diodes (OLEDs) by applying the general concept of thermally activated delayed fluorescence (TADF) to a assistant dopant, resulted in the fluorescence-OLEDs showed high external EL quantum efficiencies of 13.4 – 18.0% for blue, green, yellow, and red emission, indicating that the exciton production efficiency reached nearly 100%.

© 2014 Optical Society of America

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